(19)

(11)

EP 3 688 955 A1

(12)

(43) Date of publication: 05.08.2020 Bulletin 2020/32 (21) Application number: 18782157.4 (22) Date of filing: 27.09.2018

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) G06F 11/20(2006.01) H04L 29/08(2006.01) (86) International application number: PCT/GB2018/052761 (87) International publication number: WO 2019/064009 (04.04.2019 Gazette 2019/14)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 28.09.2017 GB 201715708 (71) Applicant: Xpertex Ltd Bristol BS1 6NL (GB)	(72) Inventors: NARAIDOO, Dr. Marcus Redland Bristol BS6 7AT (GB) SWEENEY, Mr. Joel Edward Welwyn Garden City Hertfordshire AL8 6JX (GB) (74) Representative: Stratagem IPM Limited  Meridian Court Comberton Road Toft, Cambridge CB23 2RY Toft, Cambridge CB23 2RY (GB)